Sequence of developing tricks
Test the possible 3-3 split in ♦ first, before attempting the finesse in ♥.
After Opponets win 3 tricks (two in ♣ and one in ♠) you can only afford to loose one more trick ! If you do the ♥ finesse first and it loses, you can no longer afford to test Opponents' ♦ distribution (for Declarer must lose a trick for that). Testing the ♦s first Declarer can do both if needed.